In this study, content and leaching tests of heavy metals (14 items) were analyzed to evaluate the recyclability of the sludge from wastewater treatment facilities. Additionally, this was compared with and examined with the standard of controlled waste, certification standards of compost materials, etc. In the results of the content test, Cr6+ (30.82 mg/kg) of waste from the leather, fur, and textile industries (EWC 04) and Cr6+ (103.13 mg/kg) of waste from the manufacture formulation, supply, and use of coatings (EWC 08) were higher than the proposed criteria of Cr6+ (20 mg/kg). The high level of Cr6+ concentration was observed because of the use of sodium dichromate and chromic anhydride in the materials of dyestuffs and pigments and ink in the EWC 04 and EWC 08 processes. The results on sludge in this study did not meet the standard of the Fertilizer Control Act and quality standard of fuels. In particular, the high levels of Pb and Cd was the main reason.

Abstract
 I. 서 론
 II. 실험 및 방법
  1. 폐수처리슬러지의 시료채취
  2. 분석항목과 시험분석방법
 III. 결과 및 고찰
  1. 용출 분석결과
  2. 함량 분석결과
 IV. 결 론
 References

• 장미정(국립환경과학원 자원순환연구과, Resource Recirculation Research Division, National Institute of Environmental Research) | Mi-Jeong Jang
• 김용준(국립환경과학원 자원순환연구과, Resource Recirculation Research Division, National Institute of Environmental Research) | Yong-Jun Kim
• 신선경(국립환경과학원 자원순환연구과, Resource Recirculation Research Division, National Institute of Environmental Research) | Sun-Kyoung Shin Corresponding author
• 정미정(국립환경과학원 자원순환연구과, Resource Recirculation Research Division, National Institute of Environmental Research) | Mi-Jeong Jeong
• 강영렬(국립환경과학원 자원순환연구과, Resource Recirculation Research Division, National Institute of Environmental Research) | Young-Yeul Kang
• 전태완(국립환경과학원 자원순환연구과, Resource Recirculation Research Division, National Institute of Environmental Research) | Tae-Wan Jeon
• 연진모(국립환경과학원 자원순환연구과, Resource Recirculation Research Division, National Institute of Environmental Research) | Jin-Mo Yeon